Impianto C da Pirito Villaggio Masaniello - Secondary Wastewater Treatment in Milena, Sicily

Impianto C da Pirito Villaggio Masaniello is a wastewater treatment facility located in the Pirito area of Villaggio Masaniello, serving the municipality of Milena in the province of Caltanissetta, Sicily, Italy. The plant provides secondary treatment for a population of 600, with a designed capacity of 600 cubic meters per day and an average discharge volume of 118.78 cubic meters per day. As a secondary treatment plant, it meets the minimum treatment requirements under the EU Urban Waste Water Treatment Directive (91/271/EEC) for agglomerations with a population equivalent of less than 2,000. The directive mandates secondary treatment for all discharges from agglomerations above 2,000 PE, but smaller plants like this one are subject to national regulations that typically require appropriate treatment to protect receiving waters. The plant discharges treated wastewater into the local watershed, which ultimately drains into the Mediterranean Sea via the Salso River or other smaller coastal streams. The region's semi-arid climate and agricultural land use make proper wastewater treatment essential for protecting groundwater and surface water quality, as well as the sensitive marine ecosystems along the Sicilian coast.

The plant discharges into the local drainage basin of central Sicily, which flows through the Salso River catchment and eventually reaches the Mediterranean Sea near the southern coast of Sicily. This coastal area supports diverse marine life, including seagrass meadows and fish nurseries, making proper nutrient removal critical to prevent eutrophication. The region's karst geology also means groundwater resources are vulnerable to contamination, underscoring the importance of effective secondary treatment.